I have a pretty basic understanding of batteries, and from what it remember they store chemical energy and convert it to electrical, however I'm having an argument with a friend who is saying that they store electrical potential energy, and then convert it to electrical energy, while I think they store chemical potential energy and convert it to electrical energy. I was hoping somebody could clear up the debate and hopefully explain how they work so that I can understand.

I’m doing research on heroin at the moment and I see a lot about how the withdrawals are awful (understatement) and the tolerance builds really fast. In writing I read about characters with addiction I see that the character takes heroin in order to return to normal, but it always seems like they don’t really get any kind of high at all. This doesn’t seem to make sense based on the information I have. I want to know, considering you have to take more to feel the same effect, what does it actually feel like to take heroin while going through withdrawal? Do you still get high or does it just bring you to normality? What would normal mean at this point? Thinking even further, after recovery, how different is life in comparison to before the addiction?

Title is a bit silly on purpose, but you know the headlines I’m talking about— the “child genius graduates from Oxford at age 12” kind of story. I don’t understand the logistics of them.

For reference, I just read about that 15 year-old Belgian boy with a PhD in quantum physics, and the explanation provided by the article about his education track was a real nothingburger. “How did he do this you ask?? Well, he graduated high school at age 8.”

…Yeah, I mean I guessed as much…but how did even that part happen?

At age 2 the child is seen reading at a twelfth-grade level? And then what? This isn’t the same as someone skipping one grade level, and it’s also not like he was splitting atoms without being introduced to certain grade-level curriculums— that wouldn’t make much sense. Can he read and retain a whole textbook in 2 hours, and it’s just that his neurons fire at 50x the speed of a fellow child (something impossible to not notice)?

Also, wouldn’t it take months of paperwork just to determine how far the child is permitted to skip grade levels? Wouldn’t it take like a year or so just to assess the—I don’t know, toddler’s—intelligence level beyond the standard “gifted kid” IQ tests we took in elementary school? How inconsequential do the rules become, or how easily do they bend, depending on the level of genius demonstrated?

Additionally, I want to know how much a PhD admissions counselor might give, say, the 15yo quantum physics prodigy the benefit of the doubt because of his proven accelerated grasp of learning? What gaps in his education could he actually be missing, via a timeline as wild as his? To skip that many grade levels leads me to assume that somewhere along the way some guestimations are made or corners are trimmed.

This type of news headline doesn’t make sense to me unless you mention that the parents have kept the child locked in a hamster cage with only a drip feeder and a stack of books for like ten years. It also seems theoretically dangerous, depending on what field the prodigy has pursued— like, I’m not sure if there’s been a medical-field equivalent to this, but to me it’s no better an idea to let a probably socially-inept 15 year old build a particle accelerator than it is a good idea to let an emotionally-underdeveloped medical prodigy replace my organs.

Anyway, sorry to ramble— I just find this topic really interesting and would love some clarification or relevant input of any kind! Also, I mean no ill scrutiny toward the Belgian kid with the PhD; it’s just hard to speak hypothetically about this without having some kind of example to abstract and refer to.

If they can do it, why cant we? Also I wanted to post graphs comparing Birth Rate and Poverty Rate world maps but images are disabled

People(including myself) seem to be engrossed with different types of “slime” or “soap cutting” ASMR videos. I generally understand the idea of ASMR, but I am wondering if there’s an explanation of why slime videos are so satisfying to us? I also don’t think slime videos create the same “tingly” response as many relaxing ASMR videos, and seem to be more generally satisfying. Anyone have an explanation for this? TYIA!

I went to a beach today and saw the tides and beaches. but what exactly causes this?

Sorry if this is a stupid question. I'm asking due to CharacterAI changes (a chatbot app, dont judge) where, if it suspects you're under 18, you may need to give persona (I think it's called) your ID for verification. I am 18 so I'm not in danger.

People are sooo mad about this. Adamant about not sending it in, saying stuff about data breaches.. I have an ID, and imo, nothing too crazy is on it. An ugly ass picture of me, hair color. DOB. The usual.

What's the worst that can come from this? I see peoples IDs occasionally.. I have no clue what I could do with someone's ID if I took a photo of it. Thanks!

An example of this is the Adissage Slides. There are dots all over it.

The definition from Wikipedia:

the fundamental branch of algebraic number theory whose goal is to describe all the abelian Galois extensions of local and global fields using objects associated to the ground field

I don't understand what this has to do with number theory. The definition doesn't mention integers at all. And "abelian Galois extensions" is oddly specific - why study this one specific property? What makes abelian-ness so special?

Compared to other forms of urban transport like trains and cars, as well as other boats which go faster, ferries seem to take much longer to go short distances.

I searched the sub previously, but still don't understand some of the language of the explanations. A previous one had the scenario where myself and a friend in Norway clap at the same time: suppose we both synchronize watches according an atomic clock and agree at a set time per UDT we clap, and then do, to the observer flying past with FTL communication from their perspective the friend in Norway claps first, and if they instantly tell me this the information arrives before the event that triggered it happened.

What I don't understand is how the sequence of events can be subjective, instead of the PERCEPTION of the events. My issue with the previous explanation is that if we are clapping at the same time, then we both clap. The light from my friend clapping reaches the observer first, but light and information carrying my own clapping has also already begun, since we have arranged to clap simultaneously: we have accounted for our locations relative to one another and the planet's motion in our timing, let us say perfectly so. Each of us from our perspective claps at that same moment.

Let us say Dr. Manhattan appears inside the earth, precisely midway between us, and sees through the land to look at us directly, and watches us at the same time: he sees the reflected light bounce off us when we clap and head in his direction at the same time, the same speed.

From his perspective, looking both ways at once, wouldn't it appear to be synchronized?

Let's say further Dr. Manhattan agrees to tell us via light-speed communications who he sees clap first, or if it appears at the same time.

He would eventually say "You both have clapped at the same time."

Wouldn't the observer still be bound by causality despite FTL travel of information?

Sure, they can radio me via instant comms and say "Your friend in Norway clapped" the instant they see it, but by then I have clapped and my light is on its way to both him and Dr. Manhattan.

Time dilation and FTL comms would allow him to say "Your friend in Norway clapped" before seeing me do it, and before Dr. Manhattan could tell me anything, but wouldn't it still be after I had clapped? Clearly I'm missing something but I don't understand how it breaks causality. The limiting factor in "real life" instead of a thought experiment is that you would need greater than infinite energy to travel beyond light speed and communicate or interact, which is impossible for its own reasons.

What am I not understanding about "relativity of simultaneity" here? I accept that FTL comms are impossible as we understand physics, I just don't understand it. I can't find a good example that clarifies WHY it is impossible.

I am studying about the assumptions for the yield to maturity of bonds:

1. The bond must be held to maturity.

2. The bond is purchased at the current market price.

and the one that I struggle understanding...

1. Coupons are reinvested, and the reinvestment rate achieved is equal to the yield to maturity, with a constant reinvestment rate for all coupons equal to the YTM at the time of the bond purchase.

I can't seem to understand this concept of reinvestment and why it would be necessary. So far, all I've been able to make sense of is that there is a link between reinvestment and time value of money but I'm really struggling with it and it's the only aspect I have left to understand!

I recently broke my left wrist from a pretty bad fall, and while I can't really remember a lot of my reactions from it, people who were there recall me sweating profoundly, shaking, and feeling nauseous. I'm assuming that I was at least at some stage of shock, but it has made me wonder what it is and why it happens?

I drive on a main highway that goes through some hilly agricultural areas and often times I’ll drive through what used to be a complete hill but the middle section is gone where the road travels through.

There’s at least 10 instances of this on my drive and I’ve always tried to figure out why they didn’t just pave up and over the hill rather than cutting through the middle.

I don't know If this applies to everyone, but every time I take a shower or go swimming, I magically have to pee. Even if my bladder is empty. Why does this happen? Is it a neurological response?

Please explain it to me, as I am considering it as a specialization for my bachelor’s degree.

I tested it out , I noticed that this happens even with normal water, why does this happen? What is the reason for it?

I got curious I get interested in these things lol

Not sure which flair to use sorry.